You could not get that much oil past bad valve stem seals in that amount of mileage/kilometers. Leaking valve stem seals show up as smoking from the exhaust when you first start the engine after the engine as sate shut off for awhile. The smoke goes away as the engine runs. The reason for this is as the engine is running, the exhaust valves ports have pressure on them from the hot exhaust gases. This back pressure pushes the oil up out of the valve guide and past the valve stem seal. No oil gets pulled into the exhaust port from the exhaust valve stem seals when the engine is running because of the back pressure. When you shut off the engine there is no back pressure in the exhaust ports. The oil can now run down the valve stem, past the seal and into the exhaust port or the cylinder if the exhaust valve was open. When you first start the motor this oil gets burnt at first but as the motor runs the back pressure will stop the oil flow and the smoke disappears.
Did you take the oil filler cap off the valve cover with the engine running? If you have smoke coming out with the engine running, you have blow by. Which is compression loss past the pistons, rings, and cylinders. Cylinder compression and a leak down test are two different things and require different tools. If doing a compression test, do it dry first then do it wet. To do this first just take compression readings from each cylinder and write them down. This is referred to as a dry compression test. Next, squirt one or two pumps of oil from a oil can into each cylinder through the spark plug hole in the cylinder head. Then do the compression test again and write down the results. This is the wet compression test. Compare the reads you took.
What would be normal on a good engine is that you should see an increase in the compression values in the wet test when compared to the dry test. This is because a good engine will have some compression leakage past the rings when checking the compression, which produces a compression reading loss. When you do a wet compression test, the oil helps seal up the rings and the compression reading will increase because of the better seal. On an engine that is sucking oil because of bad rings, you will see little change in the compression readings because the rings were already covered in oil and adding more oil to do the wet test does little to help. You will still see a small increase in compression because adding the oil can change the static compression ratio of the engine so that is why you only add one or at the most, two squirts of oil. You want just enough oil to help the top piston ring seal up.
Rings go bad if the motor has ever been run hot or over heating will kill the rings. Also extended oil change intervals can plugs the oil return oils in the piston (which is a problem with the 2.4L and Toyota's) which leads to oil use.
A couple of YouTube videos about the the problem and the repair for the oil use problem:
https://www.youtube.com/watch?v=PgdZSXOslDM
https://www.youtube.com/watch?v=A595LR4SQpI
I've rambled on long enough, good luck!